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关于一家肉类加工厂的碎牛肉中副结核分枝杆菌亚种存在情况的调查。

Survey on the presence of Mycobacterium avium subsp. paratuberculosis in ground beef from an industrial meat plant.

作者信息

Savi R, Ricchi M, Cammi G, Garbarino C, Leo S, Pongolini S, Arrigoni N

机构信息

Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia Romagna, National Reference Centre for Paratuberculosis, Strada Faggiola 1, Loc. Gariga-Podenzano (PC) 29027, Italy.

Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia Romagna, National Reference Centre for Paratuberculosis, Strada Faggiola 1, Loc. Gariga-Podenzano (PC) 29027, Italy.

出版信息

Vet Microbiol. 2015 Jun 12;177(3-4):403-8. doi: 10.1016/j.vetmic.2015.03.013. Epub 2015 Mar 20.

Abstract

Paratuberculosis of ruminants is characterised by chronic enteritis but, at advanced stages of the disease, a systemic dissemination of Mycobacterium avium subsp. paratuberculosis (MAP) in tissues and organs can occur. MAP has been recovered from lymph nodes and muscles of clinical and sub-clinical cows. In most countries, dairy and beef cattle infected with paratuberculosis are routinely sent to slaughter and the consumption of their meat could be a possible route of human exposure to MAP. However, few studies on MAP in ground beef are currently available. During the period November 2013-March 2014 we carried out a survey on the ground beef produced in an industrial meat processing plant. One-hundred and forty samples of ground meat were analysed by IS900-qPCR and culture (VersaTrek System). The limit of detection (LOD) of qPCR was 630 MAP cells/g (107 CFU/g) while the LOD for culture was 170-230 MAP cells/g (62-115 CFU/g). No samples were positive by direct IS900 qPCR, while two samples were positive by liquid culture. Our data suggest that the presence of live MAP in raw minced meat is possible. In order to avoid exposure for humans through the consumption of contaminated meat, proper cooking of meat is recommended.

摘要

反刍动物副结核病的特征是慢性肠炎,但在疾病的晚期,禽分枝杆菌副结核亚种(MAP)可在组织和器官中发生全身性播散。已从临床和亚临床奶牛的淋巴结和肌肉中分离出MAP。在大多数国家,感染副结核病的奶牛和肉牛通常被送去屠宰,食用它们的肉可能是人类接触MAP的一条途径。然而,目前关于碎牛肉中MAP的研究很少。在2013年11月至2014年3月期间,我们对一家工业肉类加工厂生产的碎牛肉进行了一项调查。通过IS900-qPCR和培养(VersaTrek系统)对140份碎肉样品进行了分析。qPCR的检测限(LOD)为630个MAP细胞/克(107 CFU/克),而培养的LOD为170 - 230个MAP细胞/克(62 - 115 CFU/克)。直接IS900 qPCR检测无样品呈阳性,而液体培养有两个样品呈阳性。我们的数据表明生碎肉中可能存在活的MAP。为避免人类因食用受污染的肉而接触,建议对肉进行适当烹饪。

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